From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Lanttor <lanttor.guo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: i2c adapter scan device issue
Date: Wed, 25 Nov 2009 09:53:31 +0100 [thread overview]
Message-ID: <20091125095331.5cbdbae6@hyperion.delvare> (raw)
In-Reply-To: <4B0CEDDA.2000909-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
On Wed, 25 Nov 2009 16:42:02 +0800, Lanttor wrote:
> >
> > Yes, you are correct. You can't predefine I2C devices with
> > i2c_register_board_info() if you don't also set I2C adapter numbers
> > with i2c_add_numbered_adapter(). Trying would be equivalent to sending a
> > letter to someone when you know the city and street number but not the
> > street name: unlikely to succeed.
> >
> Thanks Jean.
>
> In fact my bus driver used i2c_add_adapter() not i2c_add_numbered_adapter().
> Now I use i2c_add_numbered_adapter() to replace 2c_add_adapter() and set
> the bus number first.
>
> In one word, you mean that i2c_add_adapter() can not work normally if
> useing i2c_register_board_info() to pre-declare the i2c device, right?
Yes, exactly.
> I really need track i2c-stack in detail.
--
Jean Delvare
http://khali.linux-fr.org/wishlist.html
prev parent reply other threads:[~2009-11-25 8:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-25 4:18 i2c adapter scan device issue Lanttor
[not found] ` <4B0CAFFD.7030603-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2009-11-25 8:12 ` Jean Delvare
[not found] ` <20091125091218.518d47af-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2009-11-25 8:42 ` Lanttor
[not found] ` <4B0CEDDA.2000909-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2009-11-25 8:53 ` Jean Delvare [this message]
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